I was following the Tutorial for Rooms and Portals, but something doesn't work as expected.

When the Listener and the Emitter are outside of the room, everything is fine. When I move the Listener inside a room (with a portal), the sound from outside of the room can still be heard, but not as expected, through the portal but as a non spatial sound, meaning: the sound from outside of the room comes through both speakers, no matter how the listener is oriented to the portal. Furthermore: the sound is not attenuated anymore. I would the expect the sound to be attenuated and only be "coming from the portal".

I used the Game Object 3D Viewer to observe what is happening. When the Listener is outside the room, everything is fine, but as soon es I move it inside, all soundemitters pile up right where the portal is (which at least explains why all the attenuation is lost).